One things for sure, they won't make you any faster than any other similarly sized carbon wheel. I understand there is a lot of RD that goes into their wheels and quality of carbon is top notch which should speak for something. I went with November Rails for half the price and I'm very happy with them. I rode with a friend last night that bought some Bejing wheels for under $500 which seem to be working out well for him. The RD may be in question here though.